Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-10-14
1983-07-12
Britton, Howard
Facsimile and static presentation processing
Facsimile
Recording apparatus
350 63, 358213, H04N 306, H04N 314
Patent
active
043934080
ABSTRACT:
The optoelectronic rotary scanning device comprises optical receiving means, optical elements driven together in rotation by an afocal system consisting of at least two cylindrical optical elements designed to rotate about an axis perpendicular to the plane of their generator-lines, and an optical element for focusing on an array of detectors extending radially from the perpendicular axis. Videofrequency means are provided for processing the signals delivered by the detectors, the signals being multiplexed and stored sequentially in memory after transcription to cartesian coordinates. The videofrequency processing means also comprise a loop which subtracts the integrated mean value of the signals of all the detectors from each signal of each detector and a circuit for correcting thermal-drift residual voltages of the amplifying circuits of the detectors.
REFERENCES:
patent: 2957044 (1960-10-01), Calder
patent: 2978948 (1961-04-01), Kimber
patent: 3345120 (1967-10-01), Palmer
patent: 3614194 (1971-10-01), Harris
patent: 3693042 (1972-09-01), Fredkin
Bargues Denis
Beck Jean L.
Emmanuelli Yves A.
le Bars Jean F.
"Thomson-CSF"
Britton Howard
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